Executor of



YNTTED STATES PATENT OFFICE.

J. H. STIMPSON, 0F BALTIMORE, MARYLAND, EXECUTOR OF J. STIMPSON, DECEASED.

ICE-PITCHER.

`Speccation of Letters Patent No. 21,717, dated October 5, 1858.

To all whom t may concern:

Be it known that J. STIMPSON, deceased, late of Baltimore, in the State of Maryland, did invent an Ice-Pitcher with Three lValls, constructed and operating substantially as herein set forth.

The construction is clearly shown in the section, Figure 2, where letters a, b, c, indicate the three walls for the body, bottom and cover of the pitcher and (Z, c, the intervening non conducting spaces occupied with air.

The principal advantages of the doublewall ice pitcher for which Letters Patent were granted to said JAMES STIMPsoN are economy of ice and prevention of the drip, which latter is ot' so great inconvenience in single wall pitchers. The drip i as it is termed is the trickling of water down the outside of the pitcher and is commonly called the sweating of the pitcher. It takes place when the outside of the pitcher is cooler than the atmosphere and the amount of drip will depend upon the difference of temperature between the atmosphere and the pitcher, and the amount of moisture present in the atmosphere.

Although the double wall does to a very great extent economize ice and for the most part prevent the drip, yet it is desirable under certain circumstances to employ the treble wall for the more effectual realization of these advantages. The treble Wall adds to the weight and expense of the pitcher, but for very hot climates and damp atmospheres, it is of special use. Also it is desirable where the ice-pitcher is liable to frequent and rough handling, inasmuch as the outer wall is mechanically a protection to the inner space. A bloT upon a double wallpitcher may force the walls into contact and thus impair the non conducting property of the air space between them, but in case of a third wall the blow will most likely cause only the contact of the 'two outer walls without aect-ing the integrity of the inner air space.

What is claimed as the invention of JAMES STiMrsoN is- The treble Wall for ice pitchers as herein set forth.

JAMES H. STIMPSON,

Eecutor of J ames Sz'z'mpson, deceased.

lltnesses J oHN HOLLINGSHEAD, CHAS. Gr. PAGE. 

